Speed-indicator and the like.



B. BONNIKSEN.

SPEED INDICATOR AND THE LIKE.

APPLICATION FILED JAN. 15, 1913.

1,134,369. Patented Apr.6, 1915.

IHE NORRIS PETERS CD.. FHOTGLIThv-n, WASHINGTON D c.

I T aZZ whom it may concern:

, mnnn-nonmxsnmor covnn'rny, I

Be itimownthat I, BArmn Bdmms 'a subject of the King of Great Br'itain," and resident of Coventry, in-the county of War+ wick, England, have invented certain, new and useful Improvementsv in or Relating to Speed-Indicatorsand the like, of which the following-is a specification I Thisrin'vention relates to speed indicators and the like such-as are used on motor vehicles, and has reference to thatrtype of 1 be driven positively so that extreme flC Cu racy isobtained. This is effected by gearing the hands to the road wheel or the equiva-;

I V to dispense with as possible.

5 ed to, indicate 'up to '50 miles an] hour."

,1 beyondthe zero position. Fig. 21s a rear View of the mechanism 'withthe back plate I removed. Fig. 3'is anvelevation looking in speed indicator in" which a pair ofspeede indicating hands are alternately driven by the vehicle-and arrested and returned'tm zero, the timingibeing-eflected by aclock; work escapement actuated by the vehicles.- In previousioonstructionsr of speed indi- "cator of this 'typeJsprings havebeen em,-

ployed for returningthe handsto'the'zero hands to zero; The hands can consequently lent and driving'them 'frictionally' under the 'control'of an es'capement also driven from the road wheel which introduces thetimeelement .to the movement ofthe hands and at the same time arrests these andallows,

them'to proceed at the stated intervals.

In view of what -..has been said hereinabove, the chief object of the invention is the use, of springs as far 3 In the accompanying drawings, Figure]; is aplan of amileagespeed indicator adapt Higher speeds with theinstrument constucted in accordance with thisfin vention can be indicated, thehands in such cases passing thedirection of line 3c3 of Fig. ;2. Fig. 4 is: an elevation of the main ,driving spindle and the partsmountedthereon, Fig. 5 is a plan view of part of themechanism; Fig. '6- I is a. diagrammatic side elevation o'f thesame andrFig. 7 is an 'elevation'of the escapement device, scale than the other- 1 osi-tion, These springs are naturally unreliable, and the movement of thejhands' in "opposite directions is disconcerting. In the present invention the hands always rotate 1 or tend to rotate inrrthe same" direction, and no springs are required" forireturning the,

' afterward described.

these three views being on a larger V Specificationof Lettersfatentr I Patgnt d A t 6 1915 f Applicationfiled' ll'aiiuary 151.1913; wam 742,175; '5" 1 I :Lilie indicate jlilze part5 through-L j out the drawings.

disks A A, above fthe i former being a j; dial than the road wheel, In the ;presentr.,case

the instrument andj its driving shaft or c I 'flexible ccableccaregea'red down to less than the road wheel speed sothat wear and tear oncthe operating shaft is very considerably .c reduced. 'Thegear Bthrough the" gear train V illustrated, drives the main drivingwheel C which; is ,fixed :to a vertically arranged spindle D. I Resting looselyon, and free to rotate in relation to'the wheel C is'what may be termed cthe'release wheel This, is provided withgear teeth and also with a cam, ring F which is beveled radially at one a 'The spindle'D, see Fig. 4, provided with three pegs Gengaged by, collars and the first "collar l-l is provided with akeyway or. slot engagingthe lowest peg G Thus the collar H must always rotate" with, the

spindle but is freetto slide thereon. I Resting'on thercollar andfree to rotate having a key slot engaging the central peg rend F3 Fig.5, and at theoth'er end provided,

witha' radialswell Z for a purpose to be a d on the spindle isjthe first ratchetwheeliiJ, 1

which,1as canbe seen, is provided'witha 1 peg J? and alsowith' ratchet*teeth-.'" Above, :the wheel J is arrangeda'collar II also G. .011 this collar rests the free ratchet:

wheel K provided withratchet teeth, anda peglK g Above theselies afcollar H en 1 gaging the upper pegGr and acted on b yta spring H secured by a nut I 1 screwing on to the spindle D. -Thelnresult of this con-.- structionis that the spring, creates friction between the wheels and the collars so that all normally rotatewith theimain-spindle D--, butrthat either of the ratchet wheelsJ,

than, that of the wheelC. These ratchet wheels J and K engageby means-oftheir' ratchet teethpwith' gears (one of which is K can be held stationary, and the release T wheel 1E 5 may travel at any speed slower i of thesespindles carries one of theindicating'hands M and N. Thus the handsnor mally rotate withthe main'spindle D but The spindle l) it willloe understood, is geared to the road'wheel by gearing of knownfdimensions so that the distance the hand travels in-relationto the'movement of the road wheel is known, 'andrnovariable quantity, such as a resistance spring, 1s'1nterposed.

The release wheel meshes with anescapement pinion O'fixed to a vertical spindle.() which carries an escapement pin wheel P. The'pin wheelengages an escape ment, device-Q to be more fully described later, mounted upon a spindle Q carrying awe'ighted balance wheel R. The spindle also has attached to it one end of an escape me'ntspring or balance spring R theother j end of which is fixed.

tendsto rotate at the same rate as the latter. It is however constrainedby the escapement mechanism and can only rotate with astep bystep motion at some'preedetermined number of revolutions per minute. In the construction illustrated this wheel E is designed to rotate three times per n iinute,,pr0- Viding that the driving wheel C 1s being-rof tated at this or some higher'speed, dependent upon the gear, connection between the road wheel and the escapement and, the speed of the vehicle. Preferably the con nection is such that the instrument will in: dicate at such a low speed'as five miles an hour. e i

Each ratchet wheel is'engaged by a click S, which, as can be. seen in Fig 2, are arrangeddiametrically opposite to eachother.

As can be seen, particularly in Fig; 6, the

click is provided with a wide endhaving a part S which engages the cam-rim F and an enlarged pawl portion T which engages the ratchet teeth. 'The pawl portions T are at different heights in the twoclicks to suit the,

positions of the ratchet wheels J K see Fig. 6. i The clicks are also provided with'fingers U which engage the pins J 2 and K Thus the cam rim F can, when'the click engages the part Z, Fig. 5,-hold either click perfectly clear of the pin as well as the ratchet teeth on either wheel, or it can hold the click out of engagement with the ratchet teeth only leaving the finger U in engagement withthe p The pinsof the escapement wheel P rest against the escapement device Q, which as can be see'n 'in the enlarged view Fig. 7, comprises a'pair of collars V V suitably As stated the release. wheel is pressed frictionally against the driving wheel G and V v V V hand M at zero will beheld in that position escapement'wh eel'to pass from one side of the .collarintothe space I In operation, directly the road wheel comspaced and formed with reversed angular 7 slots WVV which allow the pins on the mences to revolve the driving spindle'D will 7 f revolveendeavoring to rotate the'friction driven ratchet wheelsJ K land the hands;

slowly thehand will travel "only a short way around the dial and stop at'aflow figure. T If thevehicle is travelingfastthe travelof the hand will bejcorrespondingly large, and it rate oflspeed will indicated" on the dial. The release and stoppagefof the hand is fefiectedby the escapemen't mechanism.

. Assumin.g one hand; say N, to be register ing12 miles a'nIhour, as shown in Fig.1; 4 and its ratchet wheel to beheld in that posi-.

tion by the pawl part of its click; S, the other by the finger 1U engaging with the pin K I Meanwhile the release wheel E is rotating the r R reverses the balanceuwheel R bringing 1 the angular slot opposite the pin. The pin passes through,, pressing against the wallet the angularslot and imparting" an impulse to. the "spindle which impulse is will move through a greater angle before y the periodoi release -eXpires,Qand a higher resisted by the spring causing the balance .,l:i..

wheel and spindle to oscillatein the reverse direction allowing another pin to pass through the slot W, space X- and Wit-as just described. Thus the release wheel E is allowed to move by a stepby stepmovement owing to the escapement device described; and this escapement makes four vibrations the reverse direction, 2', e. indirection'of 5 arrow Sufiicienfli bring the slotww Opposite P e in space which peg then immediately enters said slot TV and pressing against thewall of. said slot to cause the spindle Q to continue itsrotationfin the direction of arrow w, puttihgspring R a an I in'one second. I would state that when the pegon wheel P is pressingagainst the wall" of slot WV and causingthe spindle Q to rotate slightly in direction of arrow to, in

' cinay 'farto'ffeeithe t connected to the 'hand'N; This hand is'the' "The object or emplo mg two-handsis t; he enableone tobe alwaysin the'indicating' under-{fie "signnntil t and as vsoon asii which brings 'bonstri .rectly' th hand idi spindle "Q agai relea which holds the h from the 2; in;,K

gfffore 'free to travel'aroundnntilit reachesthe zero position, by which time the pegJ I 3 of its ratchet 'wheelwijll engage, the i'other jtongl leU, causing, the handto stop. vat zero; 7

- vAs stated thehand-MJtravels forza secol tl and then st'opsat some-point'over the id i al V 25 indicating.thespeed inraniles an hour thatq,

theevehicle has trav 'eledv during that second; After 'a' short interv'al 'thesamesequenceis .1 t repeated, the" zeroghand being allowed to travel to the speedl recordingpositionand,

the previously?recording handbeing freed, and allowed I to move on to ..zero".} Thus 7 at shortintervals' successive speedi-ndioations j are made'and 'thereiis "always a, stationary '3 J hand in an indicatingor reeordingfposition:

fAs the hands are directlyigeared to the road wheel errors are impossiblefprovidingwcoref r ectintermediate gearing ISQUSfid.

position. One handlalone conld be used,;in* *which. case it tWOllld; move from zero. to the indicating position and then'proceed-toj zero; i and againfm oveto' indicate. In such oases, fit is clear that the hand' would be moving the} greater part of j the time; whereas Therelis however no limittoth'e spee'dwvhi ch may be indi'catedgas it is permissible foorfthe r indicating hand to passgbeyond' the {Zero Q v e e '*j"*' n in dire'ction 'ofrarrow a wii p ith n t- Fcee'dingrpeg" to permit-the" 'attefito enter said slot W5 and. theo emti rdescribed is li' r p t e a ionj i he, r l a h l v H idiie; 'eonrse' thus bringsthe cam Ti 1 around so: as;

I p I withfieafch other;ieoneentridspindles gcarry- P herother t-a l ck sufit v 7 using two hands oneisalways stationary. 2

- '.'As {stated the dial if thefindicator ilhisi-j, trated is graduated, up to 50' miles "an hour.

' loosewtoothed wheel being adapted, topper with a" main driving ispi'ndle;

and I beveled radially "at oneifnd;

atelv a's' deseribed to eai se --each part; flaw-in forward; U 1 A I I 'thejsa i" e spin e g; I i heel, ratehefi wh ls albb; I fi' f zp ess n th wheels, nt frictional engagement l theill n,

ear wheels nLs'aidspindles hand I said parts and eau'se the hands to continue" rth'eirrota'tion in'the forward direction they reach their I initial. position. i I 2; In a. speed 'ind'cat r;, the combination partially rotate; in a forward direction withthetdrivingi spindle comprising a driving wheel ofastonlsaid spindle; 1a toothed wheel 1 i I loose onfsaid spindle and resting uponthe p said drivingiwheel, a cam ring on said loose toothed wheel" and beveled radially at *one" fenda'nd vprovidedWitha'radial swell'at. the 1' other? end, ratchet"wheels also,loose 1.on the spindle,.o-.omeansi for pressing ithe various 1 -whee1sintofriotionalengagementiwith,each ,other; "concentric, spindlesFoarryingthe lhands', gear, wheels lon zsaid jspindl'es'fifand 1 f a v fgearingwith"the,Saidjratchet wheelsgpawlsg engagingthe saidloo'seratchet wheelseand" haying,fingerslengaging pinsJ-on the-said' 110 m ratchet wheels, the saidcam ring on the ate upon the said pawls" asset -forth, and an es p m'ent mechanism o ti g w g upon the'said ratchet wheelsltto[temporarily arrest theerotation jof'samegtherhandrspin? g dlesand handswhen theilatjt'er fareat'an iii-1 'dicating position and to then release the said parts and .oause the, hands; to oontinue their V t rotation'in the forward directionfiintilthey: 5 f 120q" I a'ispeed indicator; the c mbination. I I fmdica'ting 'hands,,means foroperatingthe=-hands{alter reach their initialposition.

nately as jdesoribedjto oausefeaehgo'f .them'to I partiallyi'rotate in a forward;odirectionxwith to 2- l the driving spindles,comprising e a 'dLIfiViIIg -f; 1 *wheelit fast onff said spindle; a toothed "wheel i loose .on" said fspindle' and ;1festinguponthe .said drivingwheel',fa cam ring oni sfa id loose -"F' I' apement mechanism'operatingidireetly 1 I :uponthe' said ratchet.wheels;tofitempofiarilyi" arrest the, rotation ofithev same,- th

spindles and hands when the latter a I a't=an m -p sition andito 'th nrele se they a end, ratchetheels also loose on the: spindle and each provided with a pin, ars pringgr rangedgto vnor lyp e s. fc war ou xwh into frictional engagement with each, 01;l 1 e1z'-, P'aWlsmroY i h fing r daptedto e 5 ag g'ejt h p n ;;o w h resp biveim cheb wheels, said pawls also havingqpogtions hieng g f the teeth the; 1id;-lf@th wheels and portions adapted to engage .the ream; lying- 3s described concentric spindles 4 carrying e a gear ls on, S d spindles and gearing with the said ratchet Wheels, and an; escapement mechanism; operating? dixyeebly upon thegaid l 'atphet wheels If T .1

to! tempo r ly i esfi *th r r i iol f sal e,

t eyha lvspi d Y Q l I -h h a 1f ie e at an indic in -P si i n d ogth i release the saidj pa-rts angllcailse therehalligijsg -to continue their retat ion inthe forw afrd 20 Vdir two Subscribing wit nes ses B a l LB. 

